FIG. 1 is a front perspective view of a first embodiment of a hammer showing my new design;

FIG. 2 is a rear perspective view of the first embodiment of the hammer;

FIG. 3 is a front elevation view of the first embodiment of the hammer;

FIG. 4 is a rear elevation view of the first embodiment of the hammer;

FIG. 5 is a right side elevation view of the first embodiment of the hammer, the left side elevation being a mirror image thereof;

FIG. 6 is a top plan view of the first embodiment of the hammer;

FIG. 7 is a bottom plan view of the first embodiment of the hammer;

FIG. 8 is a front perspective view of the first embodiment of the hammer, wherein the broken line showing of the hammer grip is for illustrative purposes only and forms no part of the claimed embodiment;

FIG. 9 is a front perspective view of a second embodiment of the hammer;

FIG. 10 is a rear perspective view of the second embodiment of the hammer;

FIG. 11 is a front elevation view of the second embodiment of the hammer;

FIG. 12 is a rear elevation view of the second embodiment of the hammer;

FIG. 13 is a right side elevation view of the second embodiment of the hammer, the left side elevation being a mirror image thereof;

FIG. 14 is a top plan view of the second embodiment of the hammer;

FIG. 15 is a bottom plan view of the second embodiment of the hammer; and,

FIG. 16 is a front perspective view of the second embodiment of the hammer, wherein the broken line showing of the hammer grip is for illustrative purposes only and forms no part of the claimed embodiment. The broken lines immediately adjacent the shaded areas represent the bounds of the respective claimed design embodiments while all other broken lines are directed to environment and are for illustrative purposes only; the broken lines form no part of the respective claimed design embodiments.